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Re: number dot (with space)

• To: mathgroup at smc.vnet.net
• Subject: [mg99809] Re: number dot (with space)
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Fri, 15 May 2009 04:18:10 -0400 (EDT)
• Organization: Uni Leipzig
• References: <gugars$ekm$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de

Hi,

you have given an floating point number and not an exact one (1. instead 
of 1 or 0.5 instead of 1/2). Floating point numbers have a finite 
precision, so that 1.*g is not the same as 1*g.

Since Mathematica does not print the multiplication symbol "*" and uses 
a space instead to print a*b*c and a b c the multiplication 1.*g is 
printed as 1. g

Regards
   Jens

Emin Gahramanov wrote:
> Hi guys,
> sorry for the silly question (I am a Mathematica dummy). I have integrated 
> out an expression, and I do not know how to interpret the term like this:
> (-1. g + r)^4)
> What throws me off is "1. g" (g is a parameter), what is that dot after one
>  and there is also a SPACE after the dot and before "g" symbol. Sometimes I
>  get smth. like "1. r" what is that supposed to mean? If r=2, then how to
>  interpret the latter? Is it 1.2?? Or? Thanks.
>